<div style="margin-bottom: 20px;" >
  <button nz-button [nzType]="'primary'" (click)="onBack()" >
    <span>后退</span>
  </button>
</div>
<div nz-row [nzGutter]="24" *ngIf="file" >
  <div nz-col [nzSpan]="24">
    <nz-card style="min-height: 450px;" >
      <ng-template #title>
        {{ file.name }}
      </ng-template>
      <ng-template #body>
        <p>{{ file.content }}</p>
      </ng-template>
    </nz-card>
  </div>
</div>
